Tenq PTT Handheld Shoulder Waterproof Speaker MIC for Motorola Radio Xpr3300 Xpr3500 XIR P6620 XIR P6600 E8600 Push-to-talk button and microphone are located on the accessory for quick and easy use. Great for noisy and quiet areas because speaker is located right near user's ear. Built-in PTT and microphone is very handy. Talk and listen without ever holding your radio. Wide PTT Key-press area, convenient for operating, Firm and durable housing, strain relief cable for maximum durability 360 degree Clip & 3.5mm accessory jack work with listen only Surveillance Earpiece. Excellent Audio Quality, Rugged Construction. It enables you to talk and listen without having to move the radio. Just clip the mic where convenient and use it to listen and transmit. Ideal for police, military, construction, security, restaurants, hotels, bouncer, warehouses, and most tough working environments.